package cn.com.taiji.oospub.wechat.common.wxpay.pay;

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

/**
 * 生产二维码  
 * @author administor
 *
 */
public final class MatrixToImageWriter {  
  
  private static final int BLACK = 0xFF000000;  
  private static final int WHITE = 0xFFFFFFFF;  
  
  private MatrixToImageWriter() {}  
  
    
  public static BufferedImage toBufferedImage(BitMatrix matrix) {
    int width = matrix.getWidth();  
    int height = matrix.getHeight();  
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
    for (int x = 0; x < width; x++) {  
      for (int y = 0; y < height; y++) {  
        image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);  
      }  
    }  
    return image;  
  }  
  
    
  public static void writeToFile(BitMatrix matrix, String format, File file)
      throws IOException {  
    BufferedImage image = toBufferedImage(matrix);  
    if (!ImageIO.write(image, format, file)) {  
      throw new IOException("Could not write an image of format " + format + " to " + file);  
    }  
  }  
  
    
  public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
      throws IOException {  
    BufferedImage image = toBufferedImage(matrix);  
    if (!ImageIO.write(image, format, stream)) {  
      throw new IOException("Could not write an image of format " + format);  
    }  
  }  
  
}  